SandRidge Energy One independent natural gas and oil player that insiders are buying a huge amount of stock in here is SandRidge Energy ( SD), which concentrates on exploration, development and production activities. Insiders are buying this stock into some modest weakness, since shares are down just 10.6% in the last three months. SandRidge Energy has a market cap of $2.99 billion and an enterprise value of $6.65 billion. This stock trades at a premium valuation, with a trailing price-to-earnings of 697. Its estimated growth rate for this year is 1,500%, and for next year it's pegged at -268.8%. This is not a cash-rich company, since the total cash position on its balance sheet is $673.68 million and its total debt is a whopping $4.31 billion. A beneficial owner just bought 4,975,000 shares, or about $30.81 million worth of stock, at $6.10 to $6.23 per share. That same beneficial owner also just bought 3,025,000 shares, or about $18.89 million worth of stock, at $6.24 to $6.25 per share. From a technical perspective, SD is currently trending above its 50-day moving average and just below its 200-day moving average, which is neutral trendwise. This stock has been trending sideways for the last few weeks, with shares moving between $5.96 on the downside and $6.99 on the upside. A high-volume move outside of that range will likely lead to the next major trend for shares of SD. If you're bullish on SD, then I would look for long-biased trades if this stock manages to break out back above its 200-day moving average of $6.71 a share and back above resistance at $6.99 a share with high volume. Look for a sustained move or close above those levels with volume that hits near or above its three-month average action of 15.35 million shares. If that breakout triggers soon, then SD will set up to re-test or possibly take out its next major overhead resistance levels at $7.32 to $7.49 a share. Any move above those levels will then put $7.80 to $8.16 into focus for shares of SD. Amyris Another name in renewable energy space that insiders are loading up on here is Amyris ( AMRS). This company applies its industrial synthetic biology technology platform to provide alternatives to select petroleum-sourced products used in specialty chemical and transportation fuel markets worldwide. Insiders are buying this stock into weakness, since shares are off by 26% during the last six months.